03/27/22

Determine the [H+] , [OH−] , and pOH of a solution with a pH of 10.10 at 25 °C.
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03/27/22

Help to answer this please
A certain isotope has an atomic number of 16, a mass number of 37, and 16 electrons.What element is this isotope? What is the charge on the isotope? How many neutrons does the nucleus of this... more
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03/27/22

how to answer this please
Find the nuclear symbol for Iodine-133. xyZ x=y=Z=
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03/26/22

How to find the isotopes?
Iron has two isotopes.5726Fe which has a mass of 57.46 amu and an abundance of 85.93%.5826Fe which has a mass of 58.47 amu and an abundance of 14.07%.Calculate the average atomic mass of Iron... more
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03/26/22

What is the solubility of silver iodide in grams per milliliter?
What is the solubility of silver iodide in grams per milliliter at a temperature at which the Ksp of AgI is 1.45 * 10^-16?
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03/26/22

What is the pH at the equivalence point?
70.0 mL of 0.250M HNO2 is titrated to its equivalence point with 1.00M NaOH. What is the pH at the equivalence point?
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03/26/22

What is the Ksp of BaF2?
Suppose a saturated solution of barium fluoride contains 1.48 * 10^-2 M F-. What is the Ksp of BaF2?
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03/26/22

Chemistry doubt-
When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction SO2+2H2S→2H2O+3S occurs. Here hydrogen sulphide is acting as?a) an oxidizing agentb) a reducing... more
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03/25/22

Find/Determine pH
Determine the pH at the point in the titration of 40 mL of 0.200 M H2NNH2 with 0.100 M HNO3 after 80.0 mL of the strong acid has been added. The value of Kb for H2NNH2 is 3.0x10^-6
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03/25/22

What is the pH?
Determine the pH at the equivalence point in the titration of 50.0 mL of 0.300 M CH3COOH with 0.300 M NaOH. The value Ka for CH3COOH is 1.8x10^-5
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03/25/22

I need on this question and how it works.
 The volume of an idea gas is decreased form 5.0L to 2400ml at a constant pressure of 2.0 atm. Calculate the work associated with this process in J. Is work being done on the system or by the... more
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03/25/22

Not sure how to solve.
If 28.0 g of NaOH is added to 0.550 L of 1.00 M Ni(NO₃)₂, how many grams of Ni(OH)₂ will be formed in the following precipitation reaction? 2 NaOH(aq) + Ni(NO₃)₂(aq) → Ni(OH)₂ (s) + 2 NaNO₃ (aq).
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03/25/22

Determine the pH
Determine the pH at the point in the titration of 40.0 mL of 0.200 M HC4H7O2 with 0.100 M Sr(OH)2 after 10.0 mL of the strong base has been added. The values of Ka for HC4H7O2 is 1.5x10^-5.Before... more
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03/25/22

Write the balanced chemical equation
Write the balanced chemical equation for NH3 + Ni(ClO3)2
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03/25/22

help: Calculate the value of the equilibrium constant, Kc
A mixture initially contains A, B, and C in the following concentrations:  A= 0.350M  ,  B= 1.35M  , and  C= 0.300 M . The following reaction occurs and equilibrium is established:A+2B ⇌ CAt... more
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03/25/22

What is the equilibrium constant, Kp, of this reaction?
Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and chlorine gas at high... more
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03/25/22

What is the pH?
Calculate the pH when 40.0 mL of 0.150 M KOH is mixed with 20.0 mL of 0.300 M HBrO (Ka = 2.5 × 10⁻⁹)
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03/25/22

How much heat in kilojoules
How much heat in kilojoules is evolved in converting 1.00 mol of steam at 150 C to ice at -70.0 C? The heat capacity of steam is 1.84 J/gC and that of ice is 2.09 J/gC.Remember that if heat is... more
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03/25/22

Calculate the temp change.
An 9.0 g ice cube is placed into 245 g of water.Calculate the temperature change in the water upon the complete melting of the ice. Hint: Determine how much heat is absorbed by the melting ice and... more
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03/24/22

How many grams of sodium hypochlorite, NaOCl, are in 19.35 mL of a 19.58% w/v, weight per volume, NaOCl solution?
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03/24/22

What is the pH of a 2.5 × 10⁻⁴ M CsOH solution?
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03/24/22

How do I calculate liters of CO2 at stp from grams of octane? (3 step stoichiometry conversion)
How do I calculate liters of CO2 at stp from 1,735,513.195g of octane
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03/24/22

What is the pH?
Calculate the pH when 50.0 mL of 0.150 M HNO₃ is mixed with 40.0 mL of 0.250 M LiOH.
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03/24/22

What is the concentration of the tartaric acid solution?
A titration of 53.0 mL of a tartaric acid (H₂C₄H₄O₆) solution of unknown concentration with 0.805 M LiOH requires 32.0 mL to reach the second equivalence point. What is the concentration of the... more
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03/24/22

Methanol can be formed by the following UNBALANCED equation below. What is the mass in grams of methanol that can be formed from 101 molecules of CO? H₂(g) + CO(g) → CH₃OH(l).
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